London Blue Topaz Tulip Pendant Necklace in solid sterling silver. Size: 12.7 x 25.4 mm (0.5 x 1 in). Material: Sterling Silver. Total metal weight: 5.02 gr. Oval cut London blue topaz (7 x 5 mm) = 1 ct total. Colour: Blue. Stone cut: Oval Cut. Occasion: Wedding, Mother's Day, Graduation. Anniversary: 4th Anniversary. Birthstone: November.